*{box-sizing:border-box}html{color-scheme:light;scroll-behavior:smooth}body{margin:0;background:#f5f5f0;color:#1e303e;font:16px/1.65 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:#204f9c;text-underline-offset:.2em}a:hover{text-decoration-thickness:2px}button,input,textarea{font:inherit}button,a,input,textarea{touch-action:manipulation}:focus-visible{outline:3px solid #ba520c;outline-offset:4px}[hidden]{display:none!important}.skip{position:absolute;left:14px;top:-90px;background:white;padding:12px;z-index:5}.skip:focus{top:10px}header,main,footer{max-width:1160px;margin:auto;padding:24px}header{display:flex;align-items:center;justify-content:space-between;gap:18px;border-bottom:1px solid #d2d9d9}.brand{display:flex;align-items:center;gap:10px;color:#1e303e;text-decoration:none;font-weight:800;letter-spacing:.08em;font-size:18px}.brand svg{width:34px;height:34px;flex:none}nav{display:flex;flex-wrap:wrap;gap:12px 22px}nav a{font-weight:600}.hero{padding:44px 0 25px;max-width:860px}.eyebrow{text-transform:uppercase;font-size:12px;letter-spacing:.14em;font-weight:800;color:#405f70;margin:0 0 10px}h1{font-size:clamp(2.1rem,5vw,3.8rem);line-height:1.12;letter-spacing:-.04em;margin:0 0 22px}h2{font-size:1.5rem;line-height:1.25;letter-spacing:-.02em;margin:0 0 16px}h3{font-size:1.08rem;margin:24px 0 8px}.hero>p:not(.eyebrow){max-width:710px;font-size:1.08rem}.pills{display:flex;gap:8px;flex-wrap:wrap;margin:22px 0 0}.pills span{border:1px solid #bdcbcf;background:#edf2f2;border-radius:20px;padding:4px 12px;font-size:13px;color:#2f4c5c}.workbench{display:grid;grid-template-columns:1fr 1.1fr;gap:22px;align-items:start;margin:10px 0 28px}.panel{padding:28px;background:#fff;border:1px solid #ccd6d8;border-radius:14px;box-shadow:0 5px 15px #1e303e08}.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.field{margin-bottom:22px;min-width:0}.field label{display:block;font-weight:750;margin-bottom:6px}.hint{font-size:13px;color:#435d6b;display:block;margin:6px 0 0}.field input{width:100%;border:1px solid #859ba5;border-radius:7px;background:#fff;color:#172d3c;padding:12px 13px;min-height:48px;font-variant-numeric:tabular-nums}.field input[aria-invalid=true]{border:2px solid #a12925}.input-unit{display:flex;align-items:center;gap:12px}.input-unit input{max-width:250px}.actions{display:flex;gap:10px;flex-wrap:wrap}button{padding:11px 16px;min-height:46px;border:1px solid #284c68;background:#284c68;color:#fff;border-radius:7px;font-weight:700;cursor:pointer}button.secondary{background:#fff;color:#284c68}button:disabled{opacity:.5;cursor:not-allowed}.error{color:#9b2522;font-weight:650;margin-top:16px}.error:empty{display:none}.model-note{background:#eaf0f3;border-left:3px solid #597d91;padding:16px;margin-top:22px;font-size:14px}.model-note p{margin:0}.result-kicker{font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:#435d6b;margin:0 0 4px}.hex{font:800 clamp(1.9rem,5vw,2.7rem)/1.2 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:-.025em;overflow-wrap:anywhere}.rgb{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;margin:6px 0 20px}.swatch{height:115px;border:1px solid #88999a;border-radius:10px}.swatch-caption{font-size:12px;color:#435d6b;line-height:1.5;margin:8px 0 20px}.scroll{overflow:auto;max-width:100%;margin:15px 0}table{border-collapse:collapse;width:100%;font-size:13px}th,td{text-align:left;padding:10px 8px;border-bottom:1px solid #dce2e4;vertical-align:top}th{color:#314e60}td{font-variant-numeric:tabular-nums;overflow-wrap:anywhere;min-width:55px}caption{text-align:left;font-weight:750;margin:0 0 5px}.result-actions{display:grid;grid-template-columns:1fr 1fr;gap:9px}.small{font-size:13px;color:#435d6b}#equation{font-size:13px;overflow-wrap:anywhere}#copy-status{font-size:13px;margin:12px 0 0}textarea{width:100%;padding:10px;border:1px solid #859ba5;margin-top:8px}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:32px 0}.card{border-top:3px solid #839caa;padding:20px 0}.card h2{font-size:1.15rem}.card p{font-size:14px;margin:0 0 10px}.prose{max-width:790px;margin:40px auto 60px}.prose h1{font-size:clamp(2rem,4.5vw,3.1rem)}.prose h2{margin-top:34px}.prose ul,.prose ol{padding-left:24px}.prose li{margin:9px 0}.formula{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;background:#eaf0f3;border-radius:7px;padding:18px;overflow-wrap:anywhere}.example{border:1px solid #ccd6d8;border-radius:10px;padding:22px;margin:22px 0;background:white}.example h2{margin:0 0 12px}.example dl{display:grid;grid-template-columns:minmax(110px,1fr) 2fr;gap:5px 12px;margin:14px 0}.example dt{font-weight:700}.example dd{margin:0;overflow-wrap:anywhere}.inline-swatch{height:45px;border:1px solid #87989d;border-radius:5px}.mail{overflow-wrap:anywhere}footer{border-top:1px solid #d2d9d9;padding-bottom:38px;font-size:13px;color:#435d6b}footer p{margin:4px 0 12px}noscript{display:block;padding:16px;background:#fff0df;color:#603505}@media(max-width:850px){.workbench{grid-template-columns:1fr}.hero{padding-top:30px}.cards{grid-template-columns:1fr;gap:0}.card{padding:20px 0}}@media(max-width:480px){header,main,footer{padding-left:18px;padding-right:18px}header{align-items:flex-start;flex-direction:column;gap:12px}.panel{padding:20px}.field-grid{grid-template-columns:1fr;gap:0}nav{gap:10px 18px}.hero{padding-top:24px}h1{font-size:2.35rem}.prose{margin-top:26px}.example{padding:18px}.example dl{grid-template-columns:1fr}.example dd{margin-bottom:8px}.result-actions button{font-size:14px;padding:10px}.formula{font-size:14px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}